tableviewer.java

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			IBaseLabelProvider prov = getLabelProvider();
			ITableLabelProvider tprov = null;		
			ILabelProvider lprov = null;
			IViewerLabelProvider vprov = null;
			
			if(prov instanceof ILabelProvider) {
				lprov = (ILabelProvider) prov;
			}
			
			if (prov instanceof IViewerLabelProvider) {
				vprov = (IViewerLabelProvider) prov;
			} 

			if (prov instanceof ITableLabelProvider) {
				tprov = (ITableLabelProvider) prov;
			} 
			
			int columnCount = table.getColumnCount();
			TableItem ti = item;
			getColorAndFontCollector().setFontsAndColors(element);
			
			// Also enter loop if no columns added. See 1G9WWGZ: JFUIF:WINNT -
			// TableViewer with 0 columns does not work
			for (int column = 0; column < columnCount || column == 0; column++) {
				// Similar code in TreeViewer.doUpdateItem()
				String text = "";//$NON-NLS-1$
				Image image = null;
				tableColorAndFont.setFontsAndColors(ti,element,column);

				if (tprov == null) {
					if (column == 0) {
						ViewerLabel updateLabel = new ViewerLabel(item
								.getText(), item.getImage());
						
						if(vprov != null) {
							buildLabel(updateLabel,element,vprov);
						} else{
							if(lprov != null) {
								buildLabel(updateLabel,element,lprov);
							}
						}
						
//						As it is possible for user code to run the event 
			            //loop check here.
						if (item.isDisposed()) {
			                unmapElement(element, item);
			                return;
			            }   
						
						text = updateLabel.getText();
						image = updateLabel.getImage();
					}
				} else {
					text = tprov.getColumnText(element, column);
					image = tprov.getColumnImage(element, column);
				}

				//Avoid setting text to null
				if (text == null) {
					text = ""; //$NON-NLS-1$
				}
				ti.setText(column, text);
				if (ti.getImage(column) != image) {
					ti.setImage(column, image);
				}
			}
			
			
			getColorAndFontCollector().applyFontsAndColors(ti);
		}
	}

	/**
	 * Starts editing the given element.
	 * 
	 * @param element
	 *            the element
	 * @param column
	 *            the column number
	 */
	public void editElement(Object element, int column) {
		tableViewerImpl.editElement(element, column);
	}

	/**
	 * Returns the cell editors of this table viewer.
	 * 
	 * @return the list of cell editors
	 */
	public CellEditor[] getCellEditors() {
		return tableViewerImpl.getCellEditors();
	}

	/**
	 * Returns the cell modifier of this table viewer.
	 * 
	 * @return the cell modifier
	 */
	public ICellModifier getCellModifier() {
		return tableViewerImpl.getCellModifier();
	}

	/**
	 * Returns the column properties of this table viewer. The properties must
	 * correspond with the columns of the table control. They are used to
	 * identify the column in a cell modifier.
	 * 
	 * @return the list of column properties
	 */
	public Object[] getColumnProperties() {
		return tableViewerImpl.getColumnProperties();
	}

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jface.viewers.Viewer#getControl()
	 */
	public Control getControl() {
		return table;
	}

	/**
	 * Returns the element with the given index from this table viewer. Returns
	 * <code>null</code> if the index is out of range.
	 * <p>
	 * This method is internal to the framework.
	 * </p>
	 * 
	 * @param index
	 *            the zero-based index
	 * @return the element at the given index, or <code>null</code> if the
	 *         index is out of range
	 */
	public Object getElementAt(int index) {
		if (index >= 0 && index < table.getItemCount()) {
			TableItem i = table.getItem(index);
			if (i != null) {
				return i.getData();
			}
		}
		return null;
	}

	/**
	 * The table viewer implementation of this <code>Viewer</code> framework
	 * method returns the label provider, which in the case of table viewers
	 * will be an instance of either <code>ITableLabelProvider</code> or
	 * <code>ILabelProvider</code>. If it is an
	 * <code>ITableLabelProvider</code>, then it provides a separate label
	 * text and image for each column. If it is an <code>ILabelProvider</code>,
	 * then it provides only the label text and image for the first column, and
	 * any remaining columns are blank.
	 */
	public IBaseLabelProvider getLabelProvider() {
		return super.getLabelProvider();
	}

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jface.viewers.StructuredViewer#getSelectionFromWidget()
	 */
	protected List getSelectionFromWidget() {
		if(virtualManager != null) {
			return getVirtualSelection();
		}
		Widget[] items = table.getSelection();
		ArrayList list = new ArrayList(items.length);
		for (int i = 0; i < items.length; i++) {
			Widget item = items[i];
			Object e = item.getData();
			if (e != null) {
				list.add(e);
			}
		}
		return list;
	}
	
	/**
	 * Get the virtual selection. Avoid calling SWT whenever possible
	 * to prevent extra widget creation.
	 * @return List of Object
	 */

	private List getVirtualSelection() {
		
		List result = new ArrayList();
		int[] selectionIndices = getTable().getSelectionIndices(); 
		if(getContentProvider() instanceof ILazyContentProvider){
			ILazyContentProvider lazy = (ILazyContentProvider) getContentProvider();
			for (int i = 0; i < selectionIndices.length; i++) {
				int selectionIndex = selectionIndices[i];
				lazy.updateElement(selectionIndex);//Start the update
				Object element = getTable().getItem(selectionIndex).getData();
				//Only add the element if it got updated.
				//If this is done deferred the selection will
				//be incomplete until selection is finished.
				if (element != null) {
					result.add(element);
				}				
			}
		}
		else{
			for (int i = 0; i < selectionIndices.length; i++) {
				Object element = null;
				//See if it is cached
				int selectionIndex = selectionIndices[i];
				if (selectionIndex < virtualManager.cachedElements.length){
					element = virtualManager.cachedElements[selectionIndex];
				}
				if (element == null){
					// Not cached so try the item's data
					TableItem item = getTable().getItem(selectionIndex);
					element = item.getData();
				}
				if (element != null) {
					result.add(element);
				}				
			}
			
			
		}
		return result;
	}

	/**
	 * Returns this table viewer's table control.
	 * 
	 * @return the table control
	 */
	public Table getTable() {
		return table;
	}

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ContentViewer#hookControl(org.eclipse.swt.widgets.Control)
	 */
	protected void hookControl(Control control) {
		super.hookControl(control);
		Table tableControl = (Table) control;
		tableControl.addMouseListener(new MouseAdapter() {
			public void mouseDown(MouseEvent e) {
				tableViewerImpl.handleMouseDown(e);
			}
		});
	}

	/*
	 * Returns the index where the item should be inserted.
	 */
	protected int indexForElement(Object element) {
		ViewerComparator comparator = getComparator();
		if (comparator == null) {
			return table.getItemCount();
		}
		int count = table.getItemCount();
		int min = 0, max = count - 1;
		while (min <= max) {
			int mid = (min + max) / 2;
			Object data = table.getItem(mid).getData();
			int compare = comparator.compare(this, data, element);
			if (compare == 0) {
				// find first item > element
				while (compare == 0) {
					++mid;
					if (mid >= count) {
						break;
					}
					data = table.getItem(mid).getData();
					compare = comparator.compare(this, data, element);
				}
				return mid;
			}
			if (compare < 0) {
				min = mid + 1;
			} else {
				max = mid - 1;
			}
		}
		return min;
	}

	/**
	 * Initializes the table viewer implementation.
	 */
	private void initTableViewerImpl() {
		tableViewerImpl = new TableEditorImpl(this) {
			Rectangle getBounds(Item item, int columnNumber) {
				return ((TableItem) item).getBounds(columnNumber);
			}

			int getColumnCount() {
				return getTable().getColumnCount();
			}

			Item[] getSelection() {
				return getTable().getSelection();
			}

			void setEditor(Control w, Item item, int columnNumber) {
				tableEditor.setEditor(w, (TableItem) item, columnNumber);
			}

			void setSelection(StructuredSelection selection, boolean b) {
				TableViewer.this.setSelection(selection, b);
			}

			void showSelection() {
				getTable().showSelection();
			}

			void setLayoutData(CellEditor.LayoutData layoutData) {
				tableEditor.grabHorizontal = layoutData.grabHorizontal;
				tableEditor.horizontalAlignment = layoutData.horizontalAlignment;
				tableEditor.minimumWidth = layoutData.minimumWidth;
			}

			void handleDoubleClickEvent() {
				Viewer viewer = getViewer();
				fireDoubleClick(new DoubleClickEvent(viewer, viewer
						.getSelection()));
				fireOpen(new OpenEvent(viewer, viewer.getSelection()));
			}
		};
	}

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jface.viewers.Viewer#inputChanged(java.lang.Object, java.lang.Object)
	 */
	protected void inputChanged(Object input, Object oldInput) {
		getControl().setRedraw(false);
		try {
			// refresh() attempts to preserve selection, which we want here
			refresh();
		} finally {
			getControl().setRedraw(true);
		}
	}

	/**
	 * Inserts the given element into this table viewer at the given position.
	 * If this viewer has a sorter, the position is ignored and the element is
	 * inserted at the correct position in the sort order.
	 * <p>
	 * This method should be called (by the content provider) when elements have
	 * been added to the model, in order to cause the viewer to accurately
	 * reflect the model. This method only affects the viewer, not the model.
	 * </p>
	 * 
	 * @param element
	 *            the element
	 * @param position
	 *            a 0-based position relative to the model, or -1 to indicate
	 *            the last position
	 */
	public void insert(Object element, int position) {
		tableViewerImpl.applyEditorValue();
		if (getComparator() != null || hasFilters()) {
			add(element);
			return;
		}
		if (position == -1) {
			position = table.getItemCount();
		}
		
		createItem(element,position);
	}

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jface.viewers.StructuredViewer#internalRefresh(java.lang.Object)
	 */
	protected void internalRefresh(Object element) {
		internalRefresh(element, true);
	}

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jface.viewers.StructuredViewer#internalRefresh(java.lang.Object, boolean)
	 */
	protected void internalRefresh(Object element, boolean updateLabels) {
		tableViewerImpl.applyEditorValue();
		if (element == null || equals(element, getRoot())) {
			if(virtualManager == null) {
				internalRefreshAll(updateLabels);
			} else{
				internalVirtualRefreshAll();
			}
		} else {
			Widget w = findItem(element);
			if (w != null) {
				updateItem(w, element);
			}
		}
	}

	/**
	 * Refresh all with virtual elements.
	 * 
	 * @since 3.1
	 */
	private void internalVirtualRefreshAll() {
		
		Object root = getRoot();
		IContentProvider contentProvider = getContentProvider();
		
		//Invalidate for lazy
		if(!(contentProvider instanceof ILazyContentProvider) 
				&& (contentProvider instanceof IStructuredContentProvider)) {
			//Don't cache if the root is null but cache if it is not lazy.
			if(root != null){
				virtualManager.cachedElements = 
					((IStructuredContentProvider) getContentProvider()).getElements(root);
				getTable().setItemCount(virtualManager.cachedElements.length);
			}
		}
		getTable().clearAll();
	}

	/**
	 * Refresh all of the elements of the table. update the
	 * labels if updatLabels is true;
	 * @param updateLabels
	 * 
	 * @since 3.1
	 */
	private void internalRefreshAll(boolean updateLabels) {
		// the parent

		// in the code below, it is important to do all disassociates
		// before any associates, since a later disassociate can undo an